Starting and stopping mechanism.



E. N. PI'IEBIE.

Y STARTING AND STOPPING MECHANISM.

APPLICATION FILED nEc.30, 1910.

' 1,174,346. f Patented Mar. 7,1916.

3 SHEETSSHEET 2.

gimme E. N. PREBLE..

Y STARTING AND STOPPING MECHANISM.

APPLICATION FILED DEc.3o. I9Io.

1,174,846. I Patented Mar. 7, 1916.

3 SHEETS-SHEET 3- /ffPNI i o I m, Zf-Z' 7@ if] i II I I I H I E I 70 69 67 59 56 Znvevzor W'zebw @W M. I zh 0.

'UNITED sTATEs PATENT f oPEIoE EDWIN N. PREBLE, or BEVERLY, MASSACHUSETTS, AssIeNoR To UNITEI'J SHOE MACHINERY COMPANY, or PATERsoN, NEW JERSEY, A CORPORATION oENEW JERSEY.

Specicationvof Letters Patent.

STARTING AND sToPPINe MECHANIsIvLi PatentaMar. 7, 1916.

Application led December 30, 1910. Serial No. 600,145.

T 0 all whom z't may concern:

, Be it`known that I, EDWIN N'. PREBLE,

' a citizen of the United States, residing at it appertains to make and use the same.

The inventionrelates to mechanism fory controlling the starting and stopping of the driving shaft, or other rotary element, through which the operating parts of the machine are driven and more especiallyto mechanism which is adapted for use in controlling the operation of machines such, for,

instance, as sole molding, direct pressure sole leveling, or sole laying machines in which the driving mechanism is .manually thrown into operation through a treadle or f a similar device.

`In existing mechanism of this general continues to operate.` When this happensthe machine is said' to repeat, which is especially objectionablel in sole molding or sole laying machines Where it is desired to stop the machine with. one -lower form' in a position of presentation convenient to the operator, and with. the lotherlower form in operative engagement with the upper form.

The objectv of the Apresent invention is to provide an improved starting and stopping mechanism which 'is under the control of the operator to start the machine and which A' operates automatically to Stop the machine at a predetermined point in the cycle of operations Without liability of the machine repeating.

With this object in view, one feature of the invention consists in' the combination,

with a clutch -and brake and means for .dis-

engaging the clutch, of actuating -mechanism for-the brake operated independently vof the means for disengaging the clutch to apply 'the brake at a certain predetermined polnt inthe cycle of operations. i

Still further features of thel invention' consists in certain novel features of constructlon, comblnations and arrangements of parts hereinafter described and claimed,

the advantages of which will be obvious to those skilled in they art from the following description.

In the accompanying drawings illustrat` ing the preferred orm of the invention Figure 1 is a side levation of a machine embodying the various features of the in-l vention in their preferred form, Fig.` 2 is a plan view of the devices forautomatically disengaging the clutch and applying the brake, Fig. 3 is a sectional side elevationl of the device Shown in Fig. 2 and illustrating the device in its operative position. Fig.-

4 is a sectional'plan view, upon an enlarged scale, of a portionof the device employed for operating the brake, and Fig. 5 is a sectional side elevation of the portion of the device shown in Fig. 4, showing the device inl its inoperative position with the brake applied.-

In the drawings the various features of the invention are-shown embodied in a Well 'zov known type of machine for operating upon shoe soles in which two sets of forms for subjecting the soles to pressure are alter- "natelv actuated through two cranks and l in this type of machines. The cranks'are respectively connected, through the links 5 and 6 and toggles 8 and 9, to the movable lower forms 10 and 11 vwhich coperate lwith stationaryT upper forms xed in the upper portion of themachine frame 12. For the sake of clearness, and as this construction forms no part of the present invention, these parts have only been shown in dotted outline in Fig. 1.

The crank shaft is driven from a driving shaft 15 through a train of gears compris# ing the gear -16 mounted upon the driving shaft7- the intermediate gears `17.and 18 and the large gear 19 mounted upon the crank shaft, as is 'usual in this type of machine. The shaft 15 is driven through a pulley 20 Which is mounted to revolve freely on the shaft and move longitudinally thereon. rlhe pulley is provided with a friction surface forming one member of a clutch, the other member 21 of which is connected to rotate with the shaft 15. The pulley 20 1s shifted to engage and disengage the clutch through a bell crank 23, one endof Which is connected With the pulley 20 by means of studs 24 which engage an annular groove 25 formed in the hub of the pulley. The other end of the clutch lever 23 is pivotally connected to a block 26 Which is adj ustably secured upon the end of a shipper rod 27, the block being held in adjusted position by means of the set screw 28. The front en'd of the rod 27 is provided With a flanged sleeve 29 detachably mounted thereon and the flanged portion-of the sleeve engages with a recess formed in the treadle lever 30 in order to operatively connect the shipper rod and treadle lever. `The treadle lever is pivoted at 31 to'the frame of the machine and is provided at its front end with aboss 32 lin which the treadle 33 is adjustablv mounted.

Under normal conditions it is desirable to provide means for locking the clutch 1n lts operative position until a predetermined point is reached in the .cycle of operations of the machine. then automatically disengaged and the shipper rod is moved to return the clutch to its normal inoperative position.A To this end the machine is provided With What may be termed a tripping lever 34 which is piv-` `o'tally mounted on the main driving shaft' of the machine and is provided at its upper end With a pair of rolls 35 and 36 arranged to be engaged by the cranks 2 and 3, respectively. The rolls are journaled in the up@ per ends of forked arms 38 and 39 which are pivotally mounted upon a transverse shaft 40 journaled in the upper end of the tripping lever 34'. The rolls are held in any adjusted position by a pair of screws 41 and 42 which are mounted in the upper end of the lever 34 and respectively bear against the rear faces of the arms 38 and 39. A sleeve 45 is connected to move longitudinally With the shipper rod 27 and is provided With a bearing surface 46 upon its upper face. rlhe tripping lever 34 is formed as a bell crank lever pivoted upon the driving shaft 15 and the lower free end of the lever is arranged to drop behind the front rlhe locking means are Limena makes a 'half .revolution and when the cranks reach the relative positions shown in Flg. 1, the trlpping lever 34 is positively osclllated by the crank 2 a sufficient amount to disengage thelroll 47 from the front face of the sleeve 45.* The sleeve and shipper rod are then returned to their normal positions to disengage' the clutch by a tension spring 54 which operatively connects the sleeve and the upper arm of the tripping lever 34. y

Under some conditions it is desirable to place the starting and stopping of the machine directly under the control of the operator and for this purposeI an improved mechanism has been'devised for locking the sleeve 45 tothe shipper rod in different relative longitudinal position Without vary-` ing the extent of movement or the initial position of the' treadle. u Y ing and stopping of the machine is to be directly under the control of theoperator, the sleeve is moved back upon the shipper rod and locked in this position so that upon the longitudinal movement of the shipper rod and sleeve to engage the clutch, thecam this end the sleeve 45 is slidingly mounted upon the shipper rod and is connected thereto by a rod 48. rl`he rod 48 is connected at one end to a projecting lug 49r formed upon the sleeve and atits opposite end passes loosely through a slot formed in the upper portion of the treadle lever30. The rod 48 is` conveniently held in the proper rela' tion .to the treadle lever by a pin and slot` connection shown clearly in Figs. 1 and 3. The outer end of the rod 48 is provided with a latch dog 50 pivotally connected' thereto.

The latch dog 50 has a nose4 51 which normally engages `with a head 52`mounted upon the end of the shipper rod v27. 1n this position the sleeve 45 is in its advanced posh tionand upon a longitudinal movement of the shipper rod the roll 47 Will ride od the end of the sleeve and the stopping of the' machine is automatically controlled thereby. When itis desired to place the stopping of the machine under the'control oi' the operator, the latch dog 50 is turned through an angle 01:79()o into aiposition` in which the face 53 'engages with the treadle When the startroll 47 Will not ride off the end of the sleeve 'and lock the shipper rod in position. "To 105l flic lever 30. The rod 48 is then immediately moved back to bring the dog into this position by the spring 54 connected to one end thereof. This moves the sleeve 45 back a sui'cient distance `tio-prevent the bearing surface 46 of the sleeve moving out .of engagement with the roll 47 when the shipper rod is actuated to engage the clutch and in v this case the stopping of the machine is directly under the. control of the operator and the clutch will be immediately disengaged by treadle 32.

Upon depressing the treadle, it is essential that the brake shall be released. before or at the same time that the clutch is engaged to start the machine. Upon stopping the machine it is desirable thatthe brake shall be applied independently of the means for disengaging the clutch in order that the movement of the machine shall be imm diately stopped even though the clutch is not vwholly disengaged. The automatic stopping devices. are accordingly .constructed and arranged so that the brake is positively applied at the proper time by mechanism operating independently of the clutch operating devices. In the preferred form of the invention the tripping lever is utilized to actuate the brake in addition to locking the clutch in operative position. lWhen the machine is stopped the tripping lever is retained by the cranks in the position shown in Fig. l and in this position the tripping lever is arranged to apply the brake.' Itis therefore necessary to provide auxiliary means for releasing the brake priortothe starting of the machine 'as the tripping lever is held in this position until after the machine has started and the crank shaft has rotated a portion of a turn. The auxiliary means are arranged to release the brake immediately upon the movement of the shipper rod to engage the clutch so that the brake is released before or at the Sametime that the clutch is engaged to start the machine. To this end the tripping lever is provided .upon its lowerend with a U- shaped frame 56 'in which is supported a toggle lever comprisingr two arms 57 and 58. The lower end of the arm 57 is pivotally connected at 59 to the U-shaped frame 56 and the upper end of the arm 58 is pivotally connected to a bearing plate 60. The plate 60 is connected at one end to a projectinglug 61 formed upon the upper portion of the frame'56. The upper face of the plate 60'forms a-bearing surface for the lower end of a screw 62 which is mounted in the outerend .of'a brake opera-ting arm 63 so that upon a movement of the plate 60 the operating arm 63 is moved correspondingly in order to actuate the brake. The brake operating arm and connections bee5 tween the arm and tripping lever may be the-spring 54 upon releasing the -of Fig. 5 that the -ciently heavy to conveniently referred to vas `a brake actuating mechanism. In order to release the` brake preliminarily to the startingof the machine, means is provided for securing a downward movement of the bearing plate 60 relatively to the tripping lever 34. For

this purpose means is provided for -breakmg the ltoggle uponl a longitudinal movement of the shipper rod due to the depression of the treadle. The central point of the toggle is pivotally connected to an opl erating rod 64 which is provided `with a notch upon its under face normally engag-4 ing with a projecting pin 65. A sleeve 66 'is clamped upon the shipperrod and is provided with aslotted portion in which the pin 65 isifastened.- The rod 64 passes throughthe slot and the notch in the under face of the rod engages withthe pin 65. Thus-upon depressing the treadle the operating rod 64 is moved longitudinally and the toggle is broken. This allows the plate` as the crank shaft has rotated sufciently'to permit a movement of the 'tripping lever 34,

the end of the lever carrying the frame 56 drops down behind the sleeve 45. This, of course, permits a still further movement of the operating arm 63 but this movement,-is not sufficient to affect the operation 'of the bra-ke. lIn order to return 'the operating mechanism for the brake into a position in which the brake will be applied upon an upward movement of the tripping lever to release the shipper rod, means are providedfor breaking the operativeconnection between the toggle and' shipper rod and for straightening the toggle. With this' in view, a pin 67 is positioned below the middle of the rod 64 and upon a. downward movement of oneend the rod fulcrums about this pin andthe pin 65 is disengaged from: the recess in which it is seated. The rod is then moved back to its initial position, by a tension spring 68 which connects the rod and U-shaped frame 56, as shown clearlyy in Fig.

A4. The operating rod 64 is normally retained in operative engagement with vthe shipper rod 27 bv-a tension spring 69 which connects the rod with a projecting. arm 70 formed integrally with the sleeve 66. Upon a movement of the tripping lever, in order to release the clutch. the operating arm 63 is moved upwardly to simultaneously apply thebrake and it Can readily be seen that this roo lio

application o'f the 'brake is positive and does not depend for its action upon the return movement of the Yshipper rod 27.

It is desirable to employ a brake which may be applied withA considerable force to immediately overcome the inertia of the moving partsA and it is furthermore desirable that the' application' of the brake shall be accomplished with a relatively slight movement of the operating mechanism and shall only require a comparatively small. force to obtain this movement. The 'improved brake which is employed for this' purpose comprises an annular f4ring 71 which is mounted upon the main driving shaft and a pair of curved brake shoes 72 and 7 'which operatively engage with the inner face of the annular ring to retard its rotation. Thel brake shoes are pivoted at 74 at one end to a transverse arm 75 which is loosely sleeved upon the shaft 15. The opposite free ends of the brake shoes are moved apart in order to apply the brake by acam projection 76 which projects between the free ends of the brake shoes 72 and 73. When the cam projection rests in the position shown in Fig. 3,

the brake shoes are allowed to ,come together and release the brake' and when the cam proj ection is partially turned, as shown in Figs.

'1 and 5, the free ends of the brake shoes are forced apart to positively apply the brake.

` In order to lift the brake shoe 73 out of engagement with the annular ring 71 when the brake is released, a tension spring 77 is inserted between the arm 75 and the brake shoe. The cam projection 76 is mounted upon the curved operating arm 63 and is provided with an intermediate cylindrical portion whichis journaled in one end of the- 1. A starting and stopping mechanism,

' having, in combination, a clutch, a friction brake, meansunder the control of the operator arranged ,to simultaneously release the brake and engage the clutch, and mechanism arranged to positively apply the brake at a predetermined point, substantially as described.

2. A, starting land stopping mechanism,

comprising a clutch, a brake, means arranged to release the brake and engage the clutch, means for. disengaging the clutch, and means for applying the brake operating independently of the means for disengaging the clutch, substantially as described.

3. A. starting and stopping mechanism,

comprising a clutch, a brake, a shipper rod arranged to operate thelclutch, connections between the shipper rod and brake arranged to release the brake upon a movement of the shipper rod to engage the clutch, means for disengaging the clutch, and means for applying the brake operating independently of the means for disengaging the clutch, substantially as described.

4. A starting and stopping mechanism, having, in combination, a clutch, means normally tending to retain the clutch in an inoperative position, a brake, means under the Control of thepoperator arranged to simultaneously release the brake and engage the clutch, locking means arranged to retain the clutch in operative position, and mechanism arranged to l.positively apply the brake and release the locking means at a predetermined point, substantially as described.

5. A starting and stopping mechanism, having, in combinatioma clutch, means normally' tending to retain the clutch in an inoperative position, a brake, means under the control of the operator arranged to simultaneously release the brake and engage the clutch, locking means arrangedy to retain the clutch in operative position, a tripping lever,

operative connect-ions between the tripping lever and thebrake, and mechanism for positively actuating the tripping lever to apply the brake upon a movement to release the locking means, substantially as described.

6. A starting 'and' stopping mechanism, having', in combination, a clutch, a shipper rod positively connected to the clutch, means operatively engaging with the shipper rod and normallyA tending to retain the clutch in an inoperative position, a brake, a tripping lever operatively connected to the brake, means under the control of the operator arranged to move the shipper rod and engage the clutch, locking means arranged tov retain the clutch in operative position,

and a crank arranged to engage with the tripping lever, connections between the tripping lever and brake, and means for actuating the tripping lever to positively apply the brake at a predetermined point in the cycle of operations, substantially as described.

8. A starting and stopping mechanism having, in combination, a clutch, a shipper rod for engaging the clutch, a brake, a tripping lever, connections between the tripping lever and brake, andV connections between the tripping lever and shipper rod for releasing the rbrake upon a longitudinal movement of'the shipper rod prior to en- 130 gaging the clutch, substantially as described.

9. A starting and stopping mechanism comprising a brake, a bell crank lever supported adjacent thereto, an operating arm, operative connections between the arm and bell.. crank for positively. actuating the arm upon a movement of the bell crank and mechanism for automatically imparting an oscillatory movement to the bell crank to actuate the brake, substantially as described.

10. A starting and stopping mechanism, having in combination, a clutch, a shipper rod for the clutch, a brake, a tripping lever for positively applying the brake at a predetermined point in the cycle of operations, mechanism for actuating the tripping lever, and means arranged to release the brake upon movement of the shipper rod to engage the clutch, substantially as described.

11. A starting and stopping mechanism, having, in combination, a clutch, a shipper rod, a brake, a tripping lever arranged to apply the brake, and means supported upon one end of the tripping lever and varranged to release the brake upon a movement of the shipper rod to engage the clutch, substantially as described.

12. A starting and stopping mechanism having, in combination, a clutch, a brake, a.

shipper rod for engaging the clutch, a tripping lever arranged to apply the brake, actuating mechanism for the brake connected to the tripping lever, and means arranged to release the brake through the actuating mechanism upon movement of the shipper rod 13. A starting and stopping mechanism having, in combination, a clutch, a shipper rod, a tripping lever, a toggle supported at one end of the tripping lever, ra brake, operative connections between the toggle and brake, and connections between the shipper rod and toggle arranged to break the toggle and release the brake upon a longitudinal movement of the shipper rod to engage the clutch, substantially as described.

14. A starting and stopping mechanism, having, in combination, a clutch, a shipper rod, a tripping lever, a toggle supported at oneend of the tripping lever, a brake,. operative connections between the toggle and brake, and connections between the shipper rodv and toggle arranged to break the toggle and release the brake upon a longitudinal movement of the shipper rod to engage the clutch, means' arranged to break the operative connections between the toggle and shipper rod at a predetermined point in the movement of the shipper rod, and a spring arranged to straighten the toggle when the connections are broken, substantially as de-` scribed.

15. A starting and stopping mechanism comprising a clutch, a shipper rod connected thereto, a treadle lever connected to the shipper rod, a sleeve supported upon the rod, and means for determining the position of the sleeve relative to the rod comprising an operating rod connected to the sleeve and f a latch dog pivotally mounted upon the free end of the operating rod and arranged to engage with the end of the shipper` rod to hold the sleeve in a predetermined position with relation to the shipper rod, substantially as described.

'16. A starting and stopping mechanism having, 'in combination, a brake, a tripping lever, a toggle supported upon one end of the tripping lever, operative connections between the toggle and brake, a clutch, a longitudinally movable shipper rod for the clutch, a rod connected to the central point of the toggle and having a recess formed in its under face, a pin mounted to move with the shipper rod and arranged to normally engage with the recess, a stud projecting beneath the central portion of the rod, and means upon the shipper rod arranged to allow one end of the tripping lever and the toggle to move bodily downward upon a suhcient movement of the shipper rod to engage the clutch, the rod connecting the toggle being arranged to fulcrum about the stud upon the bodily downward movement of the toggle and disengage the pin from the recess, and a spring arranged to straighten the toggle, substantially. as described.

17. A starting and stopping mechanism, having in combination, a brake, a clutch, a. shipper rod for actuating the clutch, means for normally moving theshipper rod to engage the clutch, and means for positively applying the brake acting automatically when the clutch is disengaged, substantially as described.

18. A starting and stopping mechanism,

having in combination, a clutch, a brake, a

, shipper rod and apply the brake at predetermined intervals, substantially as described.

v EDWIN N. PREBLE. Witnesses:

CHESTER E. ROGERS, LAURA M. GooDRIDGE. 

